The aim of the study was to study the effect of diets using the potentially probiotic drug Bacillus amyloliquefaciens KB54 as part of compound feed (the rate of administration is 0.1% of the total diet, the content of viable spores in the final product is 106 CFU/g) in the diets of laying hens of the Dekalb cross. In the course of the study, it was established that the viability indicators of laying hens were at a high level and the safety of livestock in the studied groups during the period of the experiment was 100%; egg production in the experimental group was 96.7%, which is 2.3% more than in the control group of laying hens; chickens in the experimental group exceeded the control in growth intensity, which affected an increase in live weight by 12.5%, or 188.5 grams, which is 1.7 percentage points or 25.2 grams more than in the control group; feed costs for 10 eggs and 1 kg of egg mass in the experimental group were 1.43 and 2.36 kg, respectively, which is 11.7 and 14.5% lower than the control values. In this regard, we recommend using the probiotic preparation Bacillus amyloliquefaciens KB54 in the diets of laying hens, introduced into the compound feed in the amount of 0.1% of the total diet with the content of viable spores in the final product 106 CFU/g.
The article considers the issues of the peculiarities of how the technological stress influences the indicators of red blood cells in pigs. Clinically healthy animals were selected at the stage of mobilization of the development of stress response according to the principle of pairs of analogues: group I - breeding boars, group II - breeding sows. The oxygen budget of the body, determined by the indicators of red blood cells, during the development of a stress reaction in breeding pigs of “mature age” is also determined by their gender. Boars had average values of erythrocytes and hemoglobin in reference values, but the degree of saturation of erythrocytes with hemoglobin was lower than normal and lower than that of sows. This may indicate that boars experience a greater shortage of oxygen supply to the tissues. Sows, in general, are more stress-resistent, as evidenced by the values of the ratio of lymphocytes and neutrophils, as well as their erythrocyte indicators. They differed from boars by a significantly lower level of erythrocytes and the reference level of hemoglobin in all examined individuals. In sows, the indicator of erythrocyte saturation with hemoglobin was significantly higher than in boars.
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